Max voigt



(Model.)

`lVI. VOIGT.

LocK.

iPatented Apr. 1, 1884.',

1 m "mum f UNITED Starts Artnr Finca.

MAX VOIGT, OF NFV YORK, N. Y., ASSIGNOR OF ONE-HALF TO ROBERTG.

` SCHMIDT, OFSAME PLACE.

LOCK.

SPECIFICATION" forming part of Letters Patent No. 295,961, dated April1, 1884.

` Application filed February f2, 184. (Model.) i

.To @ZZ whom t may conoernl g Beit known that I, MAX Vorenof New York,in the county and State of New York,

y, of the same.

l. IO

have invented a new and Improved Lock for Doors, Drawers, and the like,of which the following is a specification.

Figure l is a sectional face view of my iinprovedlock, showing theinterior arrangement Fig. 2 is crossLsection of the same, taken on theline c o, Fig. 1. Fig. 3 is a face view ofthe lock. Figs. 4 and 5 areside views, partly in section, of keys that are inserted in said lock.Fig. 6 is a face view, partly in section, of a modified construction ofsaid lock; and Fig. 7, a top view, partly in section, of the same.

This invention relates to door and drawer locks, and has for its objectto so construct the lock that ifa key tting it shouldpa-s's into thehands of unauthorized persons the lock can at once be changed to makethat key useless and iitted for an entirely different key.

The invention consists in combining with a lock a movable plate, thathas projections for guiding the bit of the key to the tumblers, the

\ set of projections for one key being different from the set for otherkeys with which the same look may be opened, all as hereinafterdescribed.

llhe invention also consists in combining with said movable plate meansfor holding it in any one of several positions, as hereinafter morefully specified.

In Figs. l to 5, inclusive, my invention is shown appliedtoadrawer-lock, or any lock, in faot,vwhich has but one key-hole. Inthese figures, the letter A represents the frame o1" the lock or itscase. B is the bolt, and C the tumbler, of which a suitable number maybe used. a is the key-hole, and D the key. b is the bit of the key. A

In the look-case is shown a pivoted plate, F., with notches or aperturescl at or near its edge, into one of which notches enters a spring-bolt,e, of which the handle f extends through the side of the lock-case A, asin Fig. 3. The axle or pin g of the plate E also eX- tends through thelook-oase, and has a button or handle, h, at its outer end, as indicatedin Figs. 9, 3, 4, and 5.

On the inner1 face of the plate E, within the lock-case, are series ofprojectionsz', placed (in this form oflock) radially onto the i'ace ofthe disk, as shown in Fig. l. Vhen the key is introduced in this lockthrough the keyhole a, as in Fig. 2, its bit bwill be inline with one`set of projections t' on the plate E as in Fig. 2, and the key can onlybe turned so that it may reach the tumblers, and, finally, the bolt B,if it can pass the projection z', which` faces it. In order to do thisthe said projection i must iit the form of the bit, as in Fig. 2. Now,if the key D, which is shown in Fig. 27 should be lost or pass intounauthorized hands, or if any danger of such a disposition of the keyshould exist, the owner of the lock will only have to move the bolt eout of the notch of the plate E, and then turn said plate E so as tobring another of its projections linto the path of the key, and thenrefastenthe plate E by the bolt e in the new position. The newprojection thus placed in the path of the key will not enable the iirstkey which was lost to open the lock, but will now require an entirelydifferent key. Thus Fig. 5 shows the plate E so turned as to bring theprojection z', which was lowerrnost in Fig. 2, to the top into the pathof the key.

In selling these locks I propose to furnish with each a key or set ofkeys for every position of the plate E. The owner can iirst use one keyor set of keys, and then,when occasion arrives for requiring a change,set the lock so as to render that first key useless, and use the nextkey or set of keys, and so forth.

Although I have shown in Fig. l the plate E tombe provided with foursuchprojections i, it may be provided with more or less4 than four suchprojections, and with a corresponding number of notches or apertures d.,The button h, by whichthe disk E can be turned, may be madedetachable,so that the owner can keep it with the spare keys, and afl-lxit to the pivot or aXle g of the plate E only when occasion requires, sothat unauthorized persons cannot tamper with the lock. In like mannerthe button f of the bolt e may be made detachable.

When the lock is made with two key-holes, one on eachside, for useon anordinary room door, the plate E, instead of carrying the IOO notchedprojections 't' on its face, will carry them radially on its pivot oraxle g, as shown in Figs. 6 and 7, the difference between theprojections shown in the last-mentioned iigures and those shown in Fig.2 being that for the lock having the two keyholes the projections i musthave their recesses at the ends, While in the lock having but onekey-hole they may have these projections on the face, as appears from acomparison of Figs. 2 and 7 5 but ,I in every lother respect the lockWill operate in either case in the saine manner.

I claim- Y l. In a lock, the combination of its case,

tumblers, and bolt With the movable plate E, having series ofprojections i i, by which the lock, upon moving said plate, can beiitted for specified. Y

MAX VOIGT. Witnesses:

GUsTAv SCHNEPPE, WILLY G. E. SoHULTz.

